Burnham RTC (Return Temperature Control) Manual de instalación Pagina 17
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First measure the temperature using the thermometer.
Then measure the resistance of the sensor at the control.
The wires from the sensor must not be connected to the
control while the test is performed. Using the chart below,
estimate the temperature measured by the sensor. The
sensor and thermometer readings should be close. If the
test meter reads a very high resistance, there may be
a broken wire, a poor wiring connection or a defective
sensor. If the resistance is very low, the wiring may be
shorted, there may be moisture in the sensor or the
sensor may be defective. To test for a defective sensor,
measure the resistance directly at the sensor location.
Do not apply voltage to a sensor at any time as damage
to the sensor may result.
2
Heat
Demand
1
V
20 to 260 V (ac)
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
-46
-43
-40
-37
-34
-32
-29
-26
-23
-21
-18
-15
-12
-9
490,813
405,710
336,606
280,279
234,196
196,358
165,180
139,402
118,018
100,221
85,362
72,918
62,465
53,658
20
25
30
35
40
45
50
55
60
65
70
75
80
85
-7
-4
-1
2
4
7
10
13
16
18
21
24
27
29
46,218
39,913
34,558
29,996
26,099
22,763
19,900
17,436
15,311
13,474
11,883
10,501
9,299
8,250
90
95
100
105
110
115
120
125
130
135
140
145
150
155
32
35
38
41
43
46
49
52
54
57
60
63
66
68
7,334
6,532
5,828
5,210
4,665
4,184
3,760
3,383
3,050
2,754
2,490
2,255
2,045
1,857
160
165
170
175
180
185
190
195
200
205
210
215
220
225
71
74
77
79
82
85
88
91
93
96
99
102
104
107
1,689
1,538
1,403
1,281
1,172
1,073
983
903
829
763
703
648
598
553
4
N
Po
w
er
3
L
V
108 to 132 V (ac)
Test the Sensors
A good quality test meter capable of measuring up to 2,000,000 Ω (1kΩ = 1000 Ω) is required to measure the sensor resistance.
In addition to this, the actual temperature should be measured with a good quality digital thermometer.
Test the Power Supply
Make sure exposed wires and bare terminals are not in
contact with other wires or grounded surfaces. Turn on
the power and measure the voltage between the Power
L and Power N terminals (3 and 4) using an AC voltmeter,
the reading should be between 108 and 132 V (ac).
Test the Powered Inputs
Heat Demand
Measure the voltage between the Heat Demand
terminals (1 and 2). When the heat demand device
calls for heat, between 20 and 260 V (ac) should be
measured at the terminals. When the heat demand
device is off, less than 5 V (ac) should be measured.
- P/N 81460382 1 of 60 1
- How To Use This Manual 2
- User Interface 2
- Table of Contents 2
- Symbol Description 3
- Sequence of Operation 3
- Section A: General Operation 3
- Section B: Control Operation 4
- Section C: Control Settings 5
- 6 of 60 6
- Installation 7
- 8 of 60 8
- 9 of 60 9
- 10 of 60 10
- 11 of 60 11
- 12 of 60 12
- 13 of 60 13
- 14 of 60 14
- Diverting Valve Actuator 15
- Test the Powered Inputs 17
- Heat Demand 17
- Test the Sensors 17
- Test the Power Supply 17
- 120 V (ac) 18
- Boiler Recirculating 18
- STEP EIGHT 19
- CLEANING THE CONTROL 19
- Display Description 20
- View Menu (1 of 1) 20
- Adjust Menu (1 of 1) 21
- Troubleshooting 22
- Testing the Control 22
- Isolate the 23
- Test the Contacts 23
- Voltages and 23
- STRAPCTR relioB/ytQ 24
- 26 of 60 26
- Burnham RTC 27
- 28 of 60 28
- 30 of 60 30
- 32 of 60 32
- 34 of 60 34
- 36 of 60 36
- 38 of 60 38
- 40 of 60 40
- 43 of 60 43
- 45 of 60 45
- Appendix B1 46
- Appendix B2 47
- Appendix B3 48
- Appendix B4 49
- Appendix B5 50
- Appendix B6 52
- Appendix B7 54
- Appendix B8 56
- 58 of 60 58
- Technical Data 59
- Printed in Canada. - 06/03 60
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